Auxiliary mouthpiece for telephones



Nov. 13 1923.

o. w. AAGAARD AUXILIARY moumrmcs FOR TELEPHONES Filed Jan. 19. 1922'INVETOR dwa gaam' B Y (in ATTORNEYS and arrangements herein PatentedNov. 13,

1,474,100 1 vam s'ra'ras PATENT orl-ici-z.

' o'r'ro w. MGMBD, or onrcaeo, rumors LUXILIABY KOUTHPIECE FOBTELEPHONES.

Application lied January, 1022. Serial Io. 830,878.

To all whom it may concern:

Be it known that I, O'rro W. AAGAARD, a citizen of the United States,and a resident of Chicago, in the county of Cook and\ State of Illinois,have invented a new and useful Im rovement in Auxiliar Mouthpieces for,elephones, of .which t e followin is a full, clear, andexact-description. 1 invention relates to improvements in auxi iarymouthpieces for telephones, and 1t consists in the combinations,constructions described claimed.

An object of myinvention is to providean auxiliary mouthpiece which isadapted to .be secured to the mouthpiece of a telephone,

and which is adapted to readily conform to that portion of the facesurrounding-the mouth of the operator, whereb all of the sound waves ofthe voice are irected into the mouthpiece of the telephone, and allexternalsound waves are prevented from entering the mouthpiece.

A further object of my inventlon IS tO provide a device of the typedescribed wh ch 1s made from a resilient material, and which is providedwith a cushioned ed e, whereby the ed e will more readily con orm to theface 0 the.operator.-

A further object of my invention is to provide a device of the typedescribed which may be easily attached to the mouthplece of a telephonewithout altering the construction of the latter.

A further object of my invention is to provide a device of the typedescribed which 1s simple in construction, 'efiicient'for the purposeintended, and which is not likely to easil get out of order.

Ot or objects and advantages will appear in the following specification,and the novel features of the invention will be particularly pointed outin the appended claims.

My invention is 'il ustrated in the accompanying drawings, forming partof this application, in which;

Fi re 1 is a section along the line 11 of Figure 2, and 1 Fi re 2 is asection along the line 2-2 of Figure 1.

In carrying out m invention, I make use of an ordinary mout piece 1which is ordinary in construction and which is secured to the telephoneinstrument (not shown). I then provide an auxiliary mouthpiece 2 whichis preferably made of. anon-flexible rubber and which is silient outeredge'3. from the drawing that the edge 3 of the mouthpiece 2 is shapedso as to conform with the ortion of the face adjacent to the mouth of te operator. The edge 3 com rises a thin wall 4 which is resilient and wich is sub stantially circular in cross section. It will be noted thatthe lindrical edge 3 is greater in diameter a jacent to the sides 5 ofthe mouth iece and is less in diameter adjacent to t e top and bottom ofthe mouthpiece. This construction provides an edge 3 which is adapted toconform with the sides of the face adjacent to the mouth, and also toact as cushions between the non-resilient portion of the mouthpiece andthe face of the operator. The portions 6 adjacent to the sides 5 arecurved outwardly so as to give the utmost freedom to the person usmg thedevice, In like manner, the portions 7 are, also curved outwardlyadjacent to the top and bottom of the mouthpiece. The upper portion ofthe mouthpiece is provided with a plurality of openings 8for a purposeherea ter described.

From the foregoin description of the various parts of the %evice, theoperation thereof ma be readily understood. The device may e easilyassembled to the mouthpiece 1, and, when assembling the device, themouthpiece 1 is first'removed from the telephone (not shown), and isinserted into the enlar ed opening 9 of the mouthpiece 2. Them'oufiapiece 2 is provided with a smaller opening 10, the Walls of thisopening being so shaped as to snugly receive the outer wall of themouthpiece 1. The wall of the mouth piece 2 is resilient enough, and isshaped so as to securely grip the mouth iece 1. The threaded portion 11of the mout piece 1 extends beyond the opening 10 and ma now rovidedwith a ret will be apparent be readily secured to the telephone in theordinary manner. It will be noted that the opening 9 is substantiallyelliptical in cross section-and isslightly'U-shaped. The longer aware,the auxiliary mouthpiece also encloses the nose of the person using thedevice and thus causes undue discomfort to the person. The edge 3readily conforms itself to the portion of the face adjacent to the mouthand effectually directs all of the sound waves from the operator intothe moiithpiece 1. The person at the other end of the wire will haveless difliculty in hearing, since all of the sound waves are transmitteddirectly into the tele hone transmitter (not shown). It is furt erobvious that outside noises cannot reach the mouthpiece 1 when thedevice is in use, since the opening 9 of the auxiliary mouthpiece 2 isclosed by the face of the person usin the device. The wall 4 of the edge3 so rea ily conforms to the face of the operator that a slight acuumwould be produced within the mouthpiece 2 in case the operator moved hisface slightly away from the mouthpiece 1. This would result in stoppingthe sound waves emitted from the mouth of the operator. I thereforeprovide the openings 8 in the mouthpiece 2 to obviate this disadvantage.The 0 enin s 8, while permitting the pressure insi e of the mouthpiece 2to always remain constant with the pressure outside of the mouthpiecearenot large enough to allow the voice of the operator to pass therethrough.

From the foregoing it "will be apparent that I have provided anauxiliary mouthpiece which may be readily secured to the ordinarytelephone mouthpiece, and which is adapted to slightl conform with theportion of the face ad acent to the mouth of the operator so as todirect all of the sound waves from the operator into the transmitter andto prevent any external sound waves from enterin the transmitter. Ifurther provide a device in which the pressure therewithin will remainconstant with the external pressure. As heretofore stated, the devicedoes not enclose the nose of the operator and therefore causes no unduediscomfort to the operator. The device is simple in construction,efiicient for the purpose intended and may be readily used by anyone.

In order to make the edge 3 as resilient as possible, I provide the wall4 with an opening 13 therein. It will thus be seen that when the facecontacts the edge 3, the wall 4 will readily conform to the contours ofthe face, since the air enclosed by the wall 4 will not be compressedwhen the wall 4 is moved inwardly but will flow through the opening 13.

I claim:

1. A mouthpiece having one end thereof fashioned into an ellipticalopening, two diametrically disposed portions of the openingextendinginwardly with respect to the plane of the opening whereby theopening is substantially U-shaped in cross section, the edge of theopening bein provided with a cylindrical-shaped wall, tie portion of thecylindrical-shapcd edge disposed in the inwardly bent portions of theopening having diameters smaller than the diameters of the cylindricaledge spaced 90 therefrom, said mouthpiece having a smaller opening atits other end, the wall of the smaller opening being adapted to securelygrip a telephone mouthpiece.

2. A mouthpiece having one end thereof fashioned into an ellipticalopening, two diametrically disposed portions of the opening extendinginwardl with respect to the plane of the opening w ereby the opening issubstantially U-shaped in cross section, the edge of the opening beingprovided with a eylindrical-shaped wall, the portion of thecylindrical-shaped edge disposed in the inwardly bent portions of theopening having diameters smaller than the diameters of the cylindricaledge spaced 90 therefrom, said mouthpiece having a smaller opening atits other end, the wall of the smaller opening being adapted to securelygrip a telephone mouthpiece, the wall of said mouthpiece disposedbetween the two ends thereof, being curved so as to provide concaveinner surfaces adjacent to the enlarged opening.

3. A mouthpiece having one end thereof fashioned into an ellipticalopening, two diametrically disposed portions of the opening extendinginwardly with respect to the plane of the opening whereby the opening issubstantially U-shapcd in cross section, the edge of the opening beinprovided with a cylindrical-shaped wall, tie portion of thecylindrical-shaped edge disposed in the inwardly bent portions of theopening having diameters smaller than the diameters of the cylindricaledge spaced 90 therefrom, said mouthpiece having a smaller opening atits other end, the wall of the smaller opening being adapted to securelygrip a telephone mouthpiece, the wall of said mouthpiece disposedbetween the two ends thereof, being curved so as to provide concaveinner surfaces adjacent to the enlarged opening, and having a pluralityof openings therein.

OTTO W. AAGAARD.

